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The "Gold on the Ceiling" rockers were already double winners as they headed into the Staples Center in Los Angeles after "El Camino" was named Best Rock Album and "Lonely Boy" Best Rock Song in the early announcements prior to the main ceremony, where they added Best Rock Performance for "Lonely Boy," while frontman Dan Auerbach picked up a Producer of the Year trophy.

Pop stars fun. were crowned Best New Artist and took home Song of the Year for "We Are Young," but Mumford & Sons trumped both bands to claim Album of the Year for "Babel" at the end of the glitzy ceremony.

Record of the Year went to Gotye and Kimbra for their infectious "Somebody That I Used to Know," which also earned the pair the Best Pop Duo/Group Performance trophy.

The awards show was full of hot performances and collaborations - Taylor Swift kicked off proceedings as the sexy ringmaster of a circus-themed set while belting out her Record of the Year nominee "We Are Never Ever Getting Back Together."

Justin Timberlake and Jay-Z joined forces for the first TV performance of their new single "Suit & Tie" and the "SexyBack" hitmaker also debuted another track, "Pusher Love Girl," on music's big night, while event host LL Cool J closed the show by returning to his rap roots and teaming up with Chuck D, drummer Travis Barker and Tom Morello for an explosive finale.

The full list of winners is:

Record Of The Year - Somebody That I Used To Know by Gotye featuring KimbraAlbum Of The Year - Babel by Mumford & SonsSong Of The Year - We Are Young by Fun. featuring Janelle MonaeBest New Artist - Fun.Best Pop Solo Performance - Set Fire To The Rain (Live) by AdeleBest Pop Duo/Group Performance - Somebody That I Used To Know by Gotye featuring KimbraBest Pop Instrumental Album - Impressions by Chris BottiBest Pop Vocal Album - Stronger by Kelly ClarksonBest Dance Recording - Bangarang by Skrillex featuring SirahBest Dance/Electronica Album - Bangarang by SkrillexBest Traditional Pop Vocal Album - Kisses On The Bottom by Paul McCartneyBest Rock Performance - Lonely Boy by The Black KeysBest Hard Rock/Metal Performance - Love Bites (So Do I) by HalestormBest Rock Song - Lonely Boy by The Black KeysBest Rock Album - El Camino by The Black KeysBest Alternative Music Album - Making Mirrors by GotyeBest R&B Performance - Climax by UsherBest Traditional R&B Performance - Love On Top by BeyonceBest R&B Song - Adorn by MiguelBest Urban Contemporary Album - Channel Orange by Frank OceanBest R&B Album - Black Radio by Robert Glasper ExperimentBest Rap Performance - N****s In Paris by Jay-Z & Kanye WestBest Rap/Sung Collaboration - No Church In The Wild by Jay-Z & Kanye West featuring Frank Ocean & The-DreamBest Rap Song - N****s In Paris by Jay-Z & Kanye WestBest Rap Album - Take Care by DrakeBest Country Solo Performance - Blown Away by Carrie UnderwoodBest Country Duo/Group Performance - Pontoon by Little Big TownBest Country Song - Blown Away by Carrie UnderwoodBest Country Album - Uncaged by Zac Brown Band